Sorry I'm a bit late in answering, i only have internet access at work, so no posting over the weekend.
First of all, we do indeed need the 'illusion' of free will. I do no think so much to maintain order, in fact, free will is the opposite of order, but to maintain a reason for living, believe in ones capabilities, etc., happines.
As for everything being one big chain reaction, i would say uncountable little chain reactions, but that's just a matter of expression.
The same goes for 'predetermination', i know its just an expression, but i really think the word indicates something being 'predetermined', pre-established, that there is a plan, or a logic to it. Can we call in "Reactionalism"? Please?
Emma, would you indeed jump of a skyscraper in order to prove free will, as you said yourself, you would be reacting to disbelief in free will and to your overwhelming need to prove it.
Good and evil indeed cannot exist. Good and evil are view points, do you really think Bin Laden considers himself evil?
Good and evil are a matter of preference and necessity. Law is necesarry (at least to a certain extent) and therefore good, and braking it is evil (bad).
I will be happy to admit that insects have a mind. if that's what the scientist say, I'm perfectly happy for the insects.
As for the ability to learn, this a mere reaction to having a brain the size it is (and whatever else comes with it, as i said i'm no biologist). Brainsize is reaction upon evolution, which is an enormous chain reaction as we have established. Likewise, instinct is a reaction upon evolution.
I'm being pretty repetative, i know, but this is really all there seems to say on the subject.
“Cum ego verbo utar,” Humpty Dumpty dixit voce contempta, “indicat illud quod optem – nec plus nec minus.”
“Est tamen rogatio” dixit Alice, “an efficere verba tot res indicare possis.”
“Rogatio est, “Humpty Dumpty responsit, “quae fiat magister – id cunctum est.”